Electbic bake oven



Jan. 2, 1923. V 1,440,519. 1. C- WOODSON.

ELECTRIC BAKE OVEN.

FILED JUNE 3. 1921.-

'WlTNESS SI v b W James C. Wow/son BY J??? M ATTORNEY m ma Jan. 2, 1923;

- NITED STATES.

nuns c. woonson, or imam; mammms *ro' wns'r inenousn nnncram rnonuc'rscontra, A conrom'i zon or mcmeanfl V'Y'IILMBIC'BAKE ovmi.

- a ine-rammed me'mm. .se -m 40.1mm.-

To all whom it may concern Beit known that I, J AMES C. WoonsoN, acitizen of the United States, and a resident of Mansfield, in the countyof Richland and State of Ohio, have invented a new and usefulImprovement in Electric Bake Ovens, of which the following is aspecification.

My invention relates to electrically heated apparatus and particularlyto electrically heated reel-type bake ovens, and it has for its objectto provide a relatively simple and easil operated means for e ualizing'the heating effects at the two en s of, a bake .oven of thetypedesignated.

I have found that where the length of the enclosing casing is relativelygreat, as compared to the lateral dimensions, thereis' a tendency towardan'unequal distribution of the convection currents of heated air at eachend of the casing, resulting in unequal bakin of materialcontained inthe oven. I

. n practicing my invention, I provide a.

relatively elongated casing in which is 10- .c'ated a plurality ofrevoluble shelves upbn ,which the loaves of bread or other material tobe'baked may be placed. I provide an electric heating element located atthe .bottom of the casing and extending substantially over the entirelength thereof; I provide a pair of bafiie plates angularly dis- .posedrelatively to each other, pivotalgliy mounted above-the heating elementand a "justable relatively theretoby means of mech- I the ovenillustratediin Figure 1;

anism extendingto the outside of the casing.

In the single sheet of drawings:

2 section on the line II of Fig. 2, of a reeltype bake oven comprisingthe device embog ying myinvention, and

ig. 2 is a view,'in vertical cross section on the line II' II of Fig. 1,of a portion of A bake oven 1 comprises a casing consisting of aplurality of wall sections which are indicated generally by the numeral2, mounted on supporting members 3. A plurality of reels 4 support aplurality o shelves 5 adapted t be revolved the oven.- The sections'2are of, such contour and dimensions that, when assembled, the outline ofthe oven is substantially as indicated in Figure 1 and encloses the ovenchamber 6.

Inasmuch as the structural details of the casing, the supportingmembers3, the reel 4 andthe shelves 5 are more fully disclosed,

Figure 1 is a view, in vertical lateral cross and, claimed: in mycopending lication I Serial No. 480,289, filed June 25, 1 21, it isbelieved that a further description of these parts is unnecessary. \Atthe bottom of the casing in the oven chamber 6 1s located a plurality ofheatin elements 7 comprising, 1n general, a plur ity of metallic endframes 8,and insulated bolts 9 upo which a suitable metallic resistormember 10 may be wound. I y

Suitable electrical connections are pro vided between the individualheating units 7, and suitable terminal connectors 11 are brought out atthe rear ofthe ov'en casing and are protected by a terminal box 12,suit-v ably secured against the'casing.

The oven chamber 6. isjclosed,except for an opening at the front throughwhich bread and other material to be baked may be inserted and removed,a h'ngeddoor 13 being provided for such opening.

I have found that convection currents of oven chamber is maintained atany predetermined temperature, mayvary and may be.

heated air, "by means of whichthe entire greater atone end of the ovenchamber than at theother, resulting inunequal bakin of the articlesplaced u n' the shelves 5.

equal heating effects of the various heatin units or becausethe-convection currents o heated air are not distributed symmetricallylongitudinal halves ofthe oven in the two chamber.

In order equalize the heating eflect by insuring -a substantiallyuniform distribution of convection currents of heated air, provide twobafile plates 14 and .15 each having a downturned flange his. may becaused by t e oven not being sub-. stantia-lly horizontal, or by;reasonof un-.

at its outer end and f extending from the middle ,of the oven to theouter ends of the' respective heating. ele-- ments. I Two elongated bars16 are located at the respective sides of the baflie plates 14 theangular positionof thebaflle latesrela tively to the heating elements,provide a The separated inner ends of the two handle j lfif oomprising abar; substantially L-shape, slidably mounted n a bracket 20,

securedagainst the. outside of the oven was ing atone-end thereoig- Ametallic member the outerend ofione oi? the -baflle plates on the under.Side thereof and extends through thebottomof the'ca'sin where it 1sconnect-.

ed to theextensionof t e handle 19;.- 1" If, for any of thehereinbeforejenumerated reasons,-v it is found that 'alj portio'n ofthe; material .being baked in the'oven 1s heated to a higher temperatureat o'ne end of the oven than that-placed at'the'other end, it is onlynecessary to suitably adjust the baffle plates 14 and 15' by means.ofi-the handle member 19 until 'theheatingf' efiects areagams'ubstantially uniform as evidenced by the uniform browningfof thematerialundergoing the bakingo oration. If,-for instanc'e, itis' foundthat t e heating-eflect, is greater at that end-of the oven in which thebaffle plate 15 is located, that platemay be' moved down- 7 wardly asmall amount while, ,at the same time, the plate-14.- is moved upwardlv'a' cori'espondingly' small amount; (This has the tendency of againequalizing the-.convectlon currents of air which are caused to circulatev in the oven: by reason of the; .baflie-plate I ing'my inventionprovides" relatively simple and easily operated means for, equaliz ngthe convection currents of airlin; the,elon

structure hereinbefore described.

It may be noted -tha't-the' device embodygated oven c asi;ng, .thuspermittingfofequal-j izing. the heatingthereof.

Various -modificatio,ns ma he Inade inthe 1 device embodyinggmyinvention lwithout de parting from the spirit and scope"; thereof; y andI- desire that only such limitations shallbe pl ced thereon' a's areimposed by the prior art'jor-fa're specifically set forth'rin 'the ap'-'pended'claims. j'.

I claim" as mylinvention:

- e1" trlcally'heated 'apparatu j prising-an elongated casing, 'a 'reelextending longitudinally offsaid .casing a'nd adapted to revolvematerial to... be treated, an electric,

means located ins'aid casing for heatin'gsaid material and meansin' saidcasing-for equalizing the convection jcurrnts 'jfoff heated fluidtherein.

2.. 'An electrically heated com-i.

prising aTcaising, a reel' iii'said.casing-for moving material to be.treated iftherein, an electric heating means for heating said mate--'rial'and means in said casingfor equalizing the amountof heat-conductedto said material b convection currentsof air.

'3. n electrically heated bake oven comprising a casing, a plurality ofshelves in.

said casing. adapted to move material. to be bakedrevolubly in saidcasing,.an elect al heating element located at the bottom of sai Mia- 1.said shelves means of convection cur: "f

rents'of airand means. for varying the dis-' 'tributionofs'aidconvection currents of'air. 21;}of isubstantiallyi'U-shape, is secured'to 4L'-Ane1ectrically heated .bake oven com baked revolubly insaidcasing, an electrical heating element] forheating material placed onsaid Ishelvesby means of convection cur- L 'vprising an elongated'casingfa pluralityof shelves adapted to move material to bet rents ofair-and means 'operatively associated with said heating element forequalizing the distribution of said convection cur-- rents of air.

5. An electrically heated-fbake oven comprising an elongated casing, aplurality of elongated shelves adapted to movematei.

rial. to be bakedrevolubly in s'aidcasing, an

:electric heating means: located at the bottom ofsaid casingto heat saidmaterial and means operatively associated with said heating means, forpreventing unequal heating-of the material on said elongated Y Ishelves; 4

'6. An electrically heated bake oven com: prising an elongated casing, aplurality'ot elongated shelves'adapted to move material to be bakedrevolubly in said. casin an electric heating means located at the" ottomof said casing, to heat said materialand means 'operatively 7 associatedwith said heating means for preventing unequal heating of the material-on' said I elongated shelves," said means. comprising a pair of anularly disposed baffle plates movable relatively to the said heatingmeans.

7. electrically heated bakeoven amprisingan elongated casing, aplurality of a for preventing unequal heating of the materialon said.elongated shelves, said means. comprising a pair of bafileplates-angularly disposed relatively to each other, located above'saidelectric heating means and adj ustable relatively thereto. j

8. An electrically heated bake oven comprising an elongated casing, aplurality of elongated shelves adapted to move material to bebakedrevolubly in said casing, an elec-' tric' heating means located atthe-bottom of said casing to heat said material by con- H vectioncurrents of heated air and means operatively-associated with saidheating means for preventing unequal heating of the material on saidelongated shelves, said means comprising a pair of angularly disposedbaiile plates tiltably mounted above said heating means and an adjustingmember for plates located outside of said a 130 adjusting means for saidba e plates mounted on the outside of the casing.

10. An electrically heated bake oven comprising a caslng, means in saidcasing for moving material to be treated therein, electric means forheating the interior of the casing, and means in said casing forequalizing the amount of heat conducted to said material In testimonywhereof, I have hereunto subscribed my name this 23rd day of May, 20

JAMES C. WOODSON.

